ui: Rename IsForeground -> IsFocused

Updates #1102

examples/windowsize/main.go

@@ -287,7 +287,7 @@ func (g *game) Update(screen *ebiten.Image) error {
 		msgR = "Press R key to switch the window resizable state (only for desktops)\n"
 	}
 	fg := "Yes"
-	if !ebiten.IsForeground() {
+	if !ebiten.IsFocused() {
 		fg = "No"
 	}
 
@@ -302,7 +302,7 @@ Press T key to switch TPS (ticks per second)
 Press D key to switch the window decoration (only for desktops)
 Press L key to switch the window floating state (only for desktops)
 %s
-IsForeground?: %s
+IsFocused?: %s
 Windows Position: (%d, %d)
 Cursor: (%d, %d)
 TPS: Current: %0.2f / Max: %s

internal/driver/ui.go

@@ -37,7 +37,7 @@ type UI interface {
 	DeviceScaleFactor() float64
 	CursorMode() CursorMode
 	IsFullscreen() bool
-	IsForeground() bool
+	IsFocused() bool
 	IsRunnableInBackground() bool
 	IsVsyncEnabled() bool
 	ScreenSizeInFullscreen() (int, int)

internal/uidriver/glfw/ui.go

@@ -416,17 +416,17 @@ func (u *UserInterface) SetFullscreen(fullscreen bool) {
 	u.setWindowSize(w, h, fullscreen, u.vsync)
 }
 
-func (u *UserInterface) IsForeground() bool {
+func (u *UserInterface) IsFocused() bool {
 	if !u.isRunning() {
 		return false
 	}
 
-	var foreground bool
+	var focused bool
 	_ = u.t.Call(func() error {
-		foreground = u.window.GetAttrib(glfw.Focused) == glfw.True
+		focused = u.window.GetAttrib(glfw.Focused) == glfw.True
 		return nil
 	})
-	return foreground
+	return focused
 }
 
 func (u *UserInterface) SetRunnableInBackground(runnableInBackground bool) {

internal/uidriver/js/ui.go

@@ -76,8 +76,8 @@ func (u *UserInterface) IsFullscreen() bool {
 	return false
 }
 
-func (u *UserInterface) IsForeground() bool {
-	return u.isForeground()
+func (u *UserInterface) IsFocused() bool {
+	return u.isFocused()
 }
 
 func (u *UserInterface) SetRunnableInBackground(runnableInBackground bool) {
@@ -145,10 +145,10 @@ func (u *UserInterface) suspended() bool {
 	if u.runnableInBackground {
 		return false
 	}
-	return !u.isForeground()
+	return !u.isFocused()
 }
 
-func (u *UserInterface) isForeground() bool {
+func (u *UserInterface) isFocused() bool {
 	if !document.Call("hasFocus").Bool() {
 		return false
 	}

internal/uidriver/mobile/ui.go

@@ -74,7 +74,7 @@ func (u *UserInterface) Update() error {
 	default:
 	}
 
-	if !u.IsForeground() {
+	if !u.IsFocused() {
 		return nil
 	}
 
@@ -398,7 +398,7 @@ func (u *UserInterface) SetFullscreen(fullscreen bool) {
 	// Do nothing
 }
 
-func (u *UserInterface) IsForeground() bool {
+func (u *UserInterface) IsFocused() bool {
 	u.m.Lock()
 	fg := u.foreground
 	u.m.Unlock()

run.go

@@ -359,14 +359,14 @@ func SetFullscreen(fullscreen bool) {
 	uiDriver().SetFullscreen(fullscreen)
 }
 
-// IsForeground returns a boolean value indicating whether
+// IsFocused returns a boolean value indicating whether
 // the game is in focus or in the foreground.
 //
-// IsForeground will only return true if IsRunnableInBackground is false.
+// IsFocused will only return true if IsRunnableInBackground is false.
 //
-// IsForeground is concurrent-safe.
-func IsForeground() bool {
-	return uiDriver().IsForeground()
+// IsFocused is concurrent-safe.
+func IsFocused() bool {
+	return uiDriver().IsFocused()
 }
 
 // IsRunnableInBackground returns a boolean value indicating whether